What should you know about diphtheria and tetanus toxoids?

Diphtheria and tetanus toxoids are inactivated bacterial products used in vaccines to train protection without causing either disease. They are commonly combined with other vaccine components, and protection is maintained through a recommended vaccination schedule and later booster doses.

A toxoid is a toxin that has been treated so it cannot produce the harmful effects of the original toxin, while still prompting the immune system to recognise it. Diphtheria toxoid helps the body prepare against the toxin made by the bacterium that causes diphtheria. Tetanus toxoid prepares protection against the toxin produced when Clostridium tetani enters a wound.

These vaccines do not treat active diphtheria or tetanus. They are preventive. Diphtheria can affect the throat and may cause a thick coating, breathing difficulty, or problems caused by its toxin. Tetanus can cause painful muscle stiffness and spasms, often after contamination of a wound. Vaccination lowers the chance of these illnesses but does not replace wound care or medical assessment after an injury.

Check your vaccination record with a clinician, especially if records are incomplete, you recently moved between countries, or you are unsure when your last dose was given. The schedule depends on age, previous doses, local recommendations, pregnancy, work exposure, travel, and medical conditions. A clinician can decide whether a routine dose, a catch-up dose, or a booster is appropriate.

After vaccination, temporary soreness, redness, swelling, tiredness, or a mild fever can occur. Rest, fluids, and a cool compress may help with minor discomfort. Tell the vaccinator about a previous severe allergic reaction to a vaccine, a significant illness today, or any treatment that affects immunity. Keep a wound clean and seek advice promptly after a deep, dirty, or puncture wound if your vaccination history is uncertain.

Seek emergency care for trouble breathing, blue or grey lips, collapse, a rapidly worsening throat or neck swelling, or severe difficulty swallowing. These symptoms need assessment regardless of vaccination history. A severe allergic reaction after vaccination may include facial or throat swelling, wheezing, widespread hives, dizziness, or fainting; call emergency services if these appear.

Arrange prompt medical review for a contaminated wound, increasing jaw stiffness, painful muscle spasms, fever with marked throat pain, or a coating in the throat. Do not wait for symptoms to become severe. A [Sore Throat](/symptoms/sore-throat/) can have many causes, so its presence alone does not establish diphtheria. If diphtheria or tetanus is suspected, treatment and infection-control decisions require a healthcare professional; [Antibiotic Treatment](/treatments/medical-management/antibiotic-treatment/) may be part of care for selected bacterial infections but does not replace vaccination.

Ask which diphtheria and tetanus-containing vaccine is suitable for you, whether your record shows the needed primary doses, and when a booster should be considered. Ask what to do after a wound when your record is missing, whether pregnancy or an immune condition changes the plan, and which reactions should prompt urgent help. Families can also review the routine schedule in [Childhood Immunisation](/treatments/preventive-care-and-vaccination/childhood-immunisation/).